The Filosha Open-Path Gas Detector projects an infrared beam between a transmitter and receiver to monitor flammable gas along an entire line of sight. Ideal for perimeters, fence lines and gaps between structures, it detects clouds that point detectors could miss, providing wide-area coverage with a single continuous measurement path.
The Filosha Open-Path Gas Detector transforms wide-area flammable gas monitoring by measuring across a continuous beam rather than at a single point. A transmitter projects an infrared beam to a receiver positioned tens of metres away, and any combustible gas cloud drifting through the path attenuates specific wavelengths, allowing the detector to report an integrated concentration along the whole line of sight. This approach is highly effective at catching gas releases that could pass between individual point detectors, making it well suited to perimeter surveillance, loading jetties, pipe racks, storage tank farms and the open gaps between process structures.
Engineered for permanent outdoor installation, the system is housed in rugged, corrosion-resistant enclosures certified for hazardous areas, with heated optics and automatic gain control to sustain reliable performance through fog, dust, heat haze and the intense sunlight and humidity of the GCC and India. Alignment aids and continuous self-monitoring simplify commissioning and confirm beam integrity, while a fault or obscuration is reported fail-to-safe rather than ignored. Standard analogue and digital outputs integrate directly with fire-and-gas systems. By covering long distances with a single measurement path, the Open-Path Gas Detector reduces the number of devices required to protect large open areas, delivering broad, dependable early warning across sprawling industrial sites.
| Detection principle | Open-path infrared beam |
|---|---|
| Target gases | Flammable hydrocarbon gases |
| Measuring output | LEL-metres along beam |
| Path length | Extended line-of-sight range |
| Certification | ATEX / IECEx hazardous area |
| Output | 4-20 mA, relay, digital |
| Ingress protection | IP66 (typical) |
Specifications are indicative. Contact us for full technical data, datasheets and available variants.
Fixed infrared point detector for hydrocarbons and CO2, immune to poisoning with heated optics.
Wall or structure-mounted point detector for combustible and LEL gases, with ATEX certification.
Battery wireless gas monitor that forms a rapid-deploy detection perimeter around any work zone.
Fixed point detector for toxic gases such as H2S, CO, Cl2, NH3 and SO2 using electrochemical cells.
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